GW Instek GDM-8245 - Page 47

Trouble Shooting
47
Table 12 ACV+Hz Signal Switching
Range
Component
500mV
5V
50V
500V
K301
ON
ON
ON
ON
K302
ON
OFF
OFF
OFF
K303
OFF
OFF
OFF
OFF
K304
OFF
OFF
OFF
OFF
K305
ON
OFF
OFF
OFF
K307~K310
OFF
OFF
OFF
OFF
Table 12 shows which relay is actuated for a given ACV+Hz measurement
range.
Table 13 ACA+Hz Signal Switching
Range
Component
500uA
5mA
50mA
500mA
2A
20A
K301~K305
OFF
OFF
OFF
OFF
OFF
OFF
K307
OFF
ON
OFF
OFF
OFF
OFF
K308
OFF
OFF
ON
OFF
OFF
OFF
K309
OFF
OFF
OFF
ON
OFF
OFF
K310
OFF
OFF
OFF
OFF
ON
OFF
R301 900Ω Shunt
Selected
R302 90Ω Shunt
Selected
Selected
R303 10Ω Shunt
Selected
Selected
Selected
R305 1Ω Shunt
Selected
Selected
Selected
Selected
R308 0.1Ω Shunt
Selected
Selected
Selected
Selected
Selected
20A 0.01Ω Shunt
Selected
Table 13 shows which relay is actuated and which shunt resistor is selected for
a given ACA+Hz measurement range.
Table 14 Open/Short & Diode Measurement Signal Switching
Mode
Component
Open/Short
Diode
K301
OFF
OFF
K302
ON
ON
K303
ON
ON
K304
ON
OFF
K305~K310
OFF
OFF
Table 14 shows which relay is actuated for continuity and diode measurements.